I don't know. Never studied any kind of brain (I'm a geologist after all, I study rocks). What you say might be true!
From my point of view, with the fossils we've discovered, it seems like the average brain capacity of our ancestors to modern Homo Sapiens is just one of the indicators of our emergence. We also have to look at the rest of the body. I think we have to look at the proportions of brains to the rest of the body, too. That's what those pesty paleontologists have been doing for some time now. They've discovered this years ago. The creationists hate facts like this. They always want to be special.
Then you also talk about brain connections. Never thought of that before this thread! Isn't it so much easier to say "Goddidit" and don't have to think about it?
Edited by Pressie, : Added a paragraph